性能调优 Jobs

Our live e-commerce site is built on the Microsoft .NET stack and, while feature-complete, the backend has begun to drag under load. Pages that once rendered in under a second now spike past five, occasional time-outs appear in the logs, and CPU usage sits uncomfortably high. I’m looking for help focused strictly on bug fixes and ongoing maintenance, with the immediate priority being performance bottlenecks on the server side. You’ll start by profiling the application (IIS, ASP.NET MVC / Web API, Entity Framework, SQL Server) to pinpoint slow spots—inefficient queries, memory leaks, or blocking calls. From there, I need clean, well-commented patches that restore sub-second response times under typical traffic and remain stable in our staging environment for at least 48 h...

I have a small Drupal site that needs a focused round of improvements and I’d like everything wrapped up within a week. Here’s what I need done: • Apply design, content, and functionality updates so the site looks fresher and runs more smoothly. • Integrate Stripe as the payment gateway and confirm end-to-end transactions work in both test and live modes. • Tidy up the database with an eye on performance optimisation (indexes, query tuning, cache configuration, etc.). • Fix any minor bugs uncovered along the way and run a full round of testing before handing the site back. You may use whatever workflow tools you prefer—Drush, Composer, or straight UI—as long as the final delivery is a fully working, tested Drupal install with the above po...

I already have a Windows host ready and I want to turn it into a fully-featured GTA5M playground that blends serious Roleplay with relaxed Freeroam. The goal is to let players swap seamlessly between earning a living and cutting loose, all on one stable, well-optimized server. Roleplay expectations • Jobs / Careers with clear progression and pay grades • Persistent Housing / Real Estate ownership, including interior access and storage • Player-run businesses that can hire staff, set prices, and generate passive income Freeroam touchpoints • Wide-open exploration without artificial barriers • Deep Weapon Customization so players can tweak load-outs on the fly Custom scripting I’m counting on many bespoke scripts to tie these systems together&mda...

My 1998 Yamaha Exciter 135 will idle at the dock but refuses to move past roughly 5 mph no matter how far the throttle is advanced. After a short run the engine overheated and now won’t stay running at idle either. I need an experienced marine tech who can come out, diagnose the root cause, and fix the problem quickly so I can get back on the water. Primary focus: carb and overall engine performance. A full diagnostic run-through of linkages, carb/fuel delivery, ignition timing, and any sensors that could be limiting RPM is essential. Once you pinpoint the issue, I’ll rely on your advice to decide whether existing components can be serviced or if replacement parts are the smarter route—I don’t yet know exactly what will be needed. Location: Clarkston, Michigan. (M...

Shopify-based D2C home decor brand Current Google PageSpeed Insights score: 30 on mobile, 50 on desktop Looking for a real, verifiable improvement in load speed and core vital score on PSI — the deliverable will be checked against live PageSpeed Insights results, not a screenshot All existing apps must remain installed and fully functional (reviews, chat, upsells, etc.) — no removing or disabling app features All tracking/analytics scripts (Meta Pixel, Google Analytics, GTM) must continue to work exactly as they do now — these should not be touched Cart and checkout functionality must not be affected in any way Work must be done on a duplicate/unpublished theme first — you'll get admin access, and we'll review a preview link before anything is published l...

I have a production oracle instance that has grown beyond 100 GB and it now needs to live on SQL ,Server postgres sql . The task covers everything from preparing the source, mapping the schema, transferring the data, and validating that every object—tables, views, functions, and constraints—behaves exactly the same once it lands in SQL Server. Here is what I expect to walk away with: • A fully migrated SQL Server database, ready for cut-over • A repeatable migration script or SSIS/ADF/DMS pipeline so I can re-run the process for future refreshes • A concise migration report highlighting any datatype conversions, performance tweaks, and objects that required special handling • Verification scripts or queries that prove row counts, checksums, and refe...

Our Oracle E-Business Suite instance and its core databases are straining under heavy loads, and I need an experienced hand to restore peak performance. The assignment centers on performance tuning, specifically: • Query optimisation – analysing execution plans, AWR/ASH reports and SQL traces to cut response times and CPU usage. • Index management – auditing existing structures, redesigning or rebuilding where needed, and advising on partitioning or compression if it brings measurable gain. I will grant full access to the non-production environments first, then schedule controlled moves into production once we agree on the changes. Clear before-and-after metrics are essential; please include a concise report that shows what you changed, why, and the improvemen...

I have a full set of Figma layouts (desktop and mobile) ready to be transformed into a custom WordPress theme built with native Gutenberg blocks and Advanced Custom Fields. The site will sell digital products exclusively, so the checkout flow must be streamlined and free of any shipping logic. Performance is critical: I want mobile Core Web Vitals consistently in the green and the codebase kept lean—no bloated page-builder plugins. Clean, semantic markup, proper heading hierarchy, and schema markup should all be in place to give us the best possible foundation for on-page SEO. A customer reviews section is required on every product page. There is no need for memberships or gated content right now, but the structure should be flexible enough to accommodate those features later wit...

My Laboratory Information System is built on Laravel 8. Two issues are hurting day-to-day use: 1. Any zip bundle that users generate from the reports section takes far too long to start downloading. The slowness is the same in Chrome, Firefox, Safari, and on both desktop and mobile, so it is clearly server-side or code-level rather than a client quirk. 2. Each time a patient report is rendered, a row of test results repeats itself. The duplication shows in the view and in the final PDF export, which is confusing for clinicians. What I need you to do: • Trace and eliminate the bottleneck that delays zip file downloads (storage, buffering, headers, queue, or a misconfigured Nginx/Apache rule—whatever is responsible). • Locate and patch the logic that pulls data for the...

Bug fix + performance task in a 14 / TypeScript / Prisma / PostgreSQL real-time dashboard app. Context: the app polls a leaderboard endpoint every 2 seconds to show ranked results from an Event table (user activity events with type, userId, timestamp, and a numeric value field). Two issues: 1. Missing database indexes. The polled query filters on (accountKey, lastActiveAt) and a separate query filters on (accountKey, status, updatedAt) — neither has a covering index, so both scans get slower as event history grows. Need hand-written Prisma migration SQL adding the two composite indexes (not `prisma migrate dev` autogenerate). 2. Leaderboard fallback silently fails as empty state. The ranking endpoint has a primary data source and a fallback data source. When the...

Our production platform is built on Node.js and I’m looking for someone who can step in as a long-term partner to keep it healthy while steadily making it better. Day-to-day you’ll be digging into three broad areas: • Fixing bugs as they surface so the system remains stable. • Profiling and tuning performance to keep response times low, memory use under control, and throughput high. • Enhancing existing features—polishing the user interface, tightening up backend logic, and refining the data-processing layer whenever we see an opportunity. Most of the work is about improving what already exists rather than building brand-new modules, so an eye for incremental refactorings, clean code, and solid test coverage is essential. I’ll share a prioritize...

I’m expanding a large-scale IBM i modernization program and need 15-20 seasoned engineers who can hit the ground running this week. Every member of the squad must be equally comfortable in RPGLE and DB2/400, COBOL/400 and CBLLE, plus SQLRPGLE and SQLCBLLE; this is non-negotiable because the codebase spans all those languages. Day to day you’ll design and refactor triggers and stored procedures, keep our repositories clean with Git, and write repeatable unit tests against DB2/400 using the standard IBM i testing frameworks. We work entirely in Rational Developer for i, so an intermediate command of RDi shortcuts, debuggers, and plugin management is essential. The environment runs on IST hours, fully remote, with an initial six-month horizon and clear funding to extend well bey...

Duration : 6 Months Shift : US shift Job Summary: We are seeking a skilled Data Engineer with 5+ years of experience in designing, developing, and implementing data migration and archival solutions. The ideal candidate will have expertise in Azure cloud technologies, ETL/ELT development, data validation, and enterprise data migration projects involving ERP and HCM systems. This role will focus on building scalable data pipelines, ensuring data quality, and supporting large-scale migration and archival initiatives. Technologies: Azure Data Lake, Azure Data Bricks, Azure Data Factory, Azure DevOps, Gitlab, Github, & Snow Key Responsibilities: • Design and implement ETL processes to move data from various legacy systems to Azure data platforms. • Design and develo...

My site is loading too slowly and it’s hurting conversions. I need a specialist who can dig into the underlying causes and cut load times dramatically—page-load speed is the single metric I care about most right now. Here’s how I picture the engagement: • Benchmark the current performance (desktop and mobile) with tools such as Google PageSpeed Insights, Lighthouse, or GTmetrix. • Implement best-practice fixes—minification of CSS/JS, critical-path rendering, browser caching, server-side or plugin-based page caching, image compression/next-gen formats, lazy loading, and anything else that meaningfully shaves off seconds. • Provide a brief, clear report that shows before-and-after numbers and outlines what was changed, so I can maintain the gains g...

I need a dependable partner who can both keep my existing salon-at-home mobile app running smoothly year-round and drive the next wave of improvements. The engagement will cover two parallel tracks: 1. Annual Maintenance Contract • Proactive monitoring, quick bug fixing, security patching and version updates • Monthly health reports and a clear escalation path for any critical issues • Store-listing support whenever OS or policy changes demand it 2. Product Enhancement Roadmap • New features that extend booking, stylist management and payment capabilities • A refreshed, more intuitive user interface that feels premium and effortless for clients and professionals alike • Performance tuning to shorten load times, reduce crashes ...

I’m moving a bare-metal server at Hetzner over to a fully virtualized environment and want the foundation built right the first time. Here’s what I need: • Clean installation of the latest stable ESXi on the Hetzner host, followed by all current updates and patches. • Basic performance tuning so the hypervisor is ready for production workloads (CPU scheduling, datastore alignment, SSD caching if available, etc.). • Creation of well-structured subnets for multiple tenant VMs. • Firewall rules and protection logic on my MikroTik RouterOS appliance that will sit in front of the ESXi host, including NAT, filter, and basic DDoS hardening. I'm awaiting to order the server and necessary requirements for the setup; you will have to provide all require...

I have several enterprise-scale integration and data-migration initiatives kicking off right now and need an Azure Data Factory specialist who can jump in immediately for at least the next two months. The work centres on building, troubleshooting and optimising ADF pipelines that: • extract data from SQL Server and other database engines, plus a range of APIs (including Salesforce and S3 endpoints), • apply complex, rule-driven transformations, and • load cleansed results into a variety of target systems. You will own the whole lifecycle—from designing linked services and parameterised datasets, to writing highly-tuned SQL, to setting up monitoring and alerting so everything runs reliably at scale. I’ll look to you to surface and solve performance issues ...

My Baileys-based WhatsApp integration is working, but it is starting to lag under heavier traffic. I need an experienced developer who knows the Baileys library inside out to: • Profile the current code, identify the CPU, memory and I/O bottlenecks, and refactor or re-architect where necessary to improve throughput and lower latency. • Verify that every optimised change remains fully compatible with the Web version of WhatsApp, including session handling, QR login, message sending/receiving, media uploads and reconnection logic. • Provide a concise report of the issues discovered, the steps taken to fix them and before-and-after performance metrics (e.g. average response time, messages per second, memory footprint). Acceptance criteria – Messages and media must...